How do you convert kilopascals to inches of mercury?

To convert kilopascals (kPa) to inches of mercury (inHg), multiply the pressure in kilopascals by 0.2953 (inches of mercury = kilopascals × 0.2953).

What is 5 kilopascals in inches of mercury?

5 kilopascals (5 kPa) is equal to 1.4765 inches of mercury (1.4765 inHg).

Which is larger, 1 kilopascal (kPa) or 1 inch of mercury (inhg) (inHg)?

One inch of mercury (inhg) (inHg) is larger than one kilopascal (kPa). Specifically, 1 inHg equals 3.38639 kPa, while 1 kPa is 0.2953 inHg.

How do I convert back from inches of mercury (inHg) to kilopascals (kPa)?

To reverse the calculation from inHg to kPa, multiply your inch of mercury (inhg) value by the inverse factor 3.38639 (or divide by 0.2953). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round kPa to inHg results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 kPa ≈ 1.48 inHg). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Kilopascals to Inches of Mercury Converter

Enter the pressure in kilopascals below to convert it to inches of mercury.

Inches of Mercury to Kilopascals (inHg → kPa)

Convert Kilopascals to Inches of Mercury

Enter a value in kilopascals (kPa) to convert to inches of mercury (inHg).

Value (kPa)

From

Result

•

1.476499008inches of mercury

5 kPa = 1.476499008 inHg

Result updates automatically

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Equivalent Measurements Across UnitsFor 5 kPa

Pascals5,000 Pa

Bars0.05 bar

PSI0.72519 psi

Atmospheres0.04935 atm

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))

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Kilopascal to Inch of Mercury Conversion Table

Table showing various kilopascal measurements converted to inches of mercury. Click any preset value or arrow to load it into the converter.

Kilopascals (kPa)	Inches of Mercury (inHg)
1 kPa	0.2952998 inHg
2 kPa	0.5905996 inHg
2.5 kPa	0.7382495 inHg
5 kPa	1.476499 inHg
10 kPa	2.952998 inHg
15 kPa	4.429497 inHg
20 kPa	5.905996 inHg
25 kPa	7.382495 inHg
30 kPa	8.858994 inHg
50 kPa	14.7649901 inHg

How to Convert Kilopascals to Inches of Mercury

To convert kilopascals to inches of mercury, multiply the pressure by the following conversion ratio: 0.2952998 inches of mercury/kilopascal.

Since one kilopascal is equal to 0.2952998 inches of mercury, you can use this simple formula to convert:

inches of mercury = kilopascals × 0.2952998

The pressure in inches of mercury is equal to the pressure in kilopascals multiplied by 0.2952998.

For example, here's how to convert 5 kilopascals to inches of mercury using the formula above.

inches of mercury = (5 kPa × 0.2952998) = 1.476499 inHg

How Many Inches of Mercury Are in a Kilopascal?

There are 0.2952998 inches of mercury in a kilopascal, which is why we use this value in the formula above.

1 kPa = 0.2952998 inHg|1 inHg = 3.386389 kPa

Our kilopascal to inch of mercury calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Kilopascals and inches of mercury are both units used to measure pressure. Keep reading to learn more about each unit.

What Is a Kilopascal?

A kilopascal is a unit of pressure equal to 1,000 pascals (Pa), the base unit for pressure. Equal to 1,000 Pascals (1 kN/m²). [1]

The kilopascal is classified as a metric and SI-compatible unit of pressure. Kilopascals can be abbreviated as kPa; for example, 1 kilopascal can be written as 1 kPa.

In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilopascal (kPa) a convenient decimal multiple of the pascal (Pa).

In practice, kilopascals (kPa) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about kilopascals in our Pressure Converter.

What Is an Inch of Mercury?

An inch of mercury is a unit of pressure equal to 3,386.389 pascals (Pa), the base unit for pressure. Aviation altimeter & weather barometer unit equal to 3,386.389 Pascals. [2]

The inch of mercury is classified as a US customary unit of pressure. Inches of Mercury can be abbreviated as inHg; for example, 1 inch of mercury can be written as 1 inHg.

When working with inches of mercury (inHg) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, inches of mercury (inHg) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within US customary workflows, engineering documentation, and technical data sheets.

Learn more about inches of mercury in our Pressure Converter.

When converting pressure between kilopascals (kPa) and inches of mercury (inHg), keep full floating-point precision (1 kPa = 0.2952998 inHg; 1 inHg = 3.386389 kPa) during intermediate calculations and round only the final inch of mercury figure to match your instrument tolerance.

More Kilopascal & Inch of Mercury Conversions

Need to calculate in the opposite direction? Use our inches of mercury to kilopascals calculator to switch your starting unit immediately. You can also explore related tools such as converting inches of mercury to kilopascals, converting hectopascals to inches of mercury, or converting kilopascals to psi.

Convert from Kilopascals

Convert to Inches of Mercury

Frequently Asked Questions

There are 0.2953 inches of mercury (inHg) in 1 kilopascal (kPa). Conversely, 1 inch of mercury (inHg) is equal to 3.38639 kilopascals (kPa).

Pressure Converter

Quick Info

Direct Factor: 1 kilopascal (kPa) equals 0.2953 inches of mercury (inHg).
Inverse Factor: 1 inch of mercury (inhg) (inHg) equals 3.38639 kilopascals (kPa).
Formula: inches of mercury = kilopascals × 0.2953.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Kilopascal (kPa)

Equal to 1,000 Pascals (1 kN/m²).

Inch of Mercury (inHg) (inHg)

Aviation altimeter & weather barometer unit equal to 3,386.389 Pascals.

Pascal (Pa)

SI derived unit of pressure equal to 1 Newton per square meter (N/m²).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Pressure & Stress)
Source
[2]NIST CUU · Derived SI Unit: Pascal (Pa)
Source
[3]BIPM · SI Brochure (9th Ed.) — Mechanics
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Kilopascals (kPa) to Inches of Mercury (inHg)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Kilopascal (kPa) & Inch of Mercury (inHg) (inHg)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (kPa to inHg)
BIPM Reference

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